Great service and response! They came in to install a new unit for the upstairs. Not only were these guys professional, they were respectful and gave helpful tips on best practice maintenance! I was impressed with their lead guy Larry and the way he ran his small crew. They cleaned up after themselves and made sure we knew what to expect every step of the way. Just yesterday, their work was final inspected and passed with no issues. I'd recommend Mainstream to anyone who needs HVAC work done!! And ask for Larry! He is the bomb! read more

Beware of this business. It was only after disputing the credit card charges that they completed the system in the new home I'm building. The owner enjoys placing blame on his customers. Their employees lack the training, skills, and company support to do their jobs. My system was recently completed and this morning it failed. The reason is it failed was it was not installed correctly. The owner will come on here and try and blame me for all the issues and you're free to figure out who's lying and who's telling the truth? And if you want to talk to me or see the horrific job they did please feel free to contact me. This company did a horrible job and has no clue what customer service means or customer satisfaction. Looks very much like they're going out of business so please do your diligence before signing a contract with Mainstream. Darryl Pater (owner of Mainstream) will respond to this and tell you this was all my fault. Believe who you will but his word is worthless and his moral compass seems broken. Frank Stewart is the only employee he has that is a man of his word and actually cares about the customer. I support small businesses wholeheartedly but this guy doesn't deserve to be in business any longer read more

Saturday night, after hours, came and got one unit up and running (simple fix) and diagnosed the other and charged us a $89 service call. These guys are our future go to company. Honest, reliable, friendly, on time and affordable. What is there not to like? Thank you Sam @ Mainstream Heating & Cooling!!! read more

What a pleasure it is to do business with a company like Mainstream. All plusses: 1. From the first call to the office. Greeted by a very friendly person who was very knowledgeable and courteous. 2. On time for the inspection and cleaning with a call ahead by Jacob. 3. The work was done in a timely fashion for a very reasonable price. 4. Professional in every respect. 5.$79.00 for a complete cleaning and diagnosis. Can't get any better than that. Great job Jacob and Mainstream. read more

I HIGHLY RECOMMEND MAINSTREAM HEATING AND COOLING! They have quality employees that do quality work, take the time to explain what was done, and come when you need them! I called at 6:30 pm and they had it fixed by 8:30 pm. I am truly impressed. Thank you Mainstream for what you do! read more

I want to recognize a professional heating and air repair service that didn't try to screw me with unnecessary repairs or up charges. The service tech was on time and upfront about the repair. No doubt I will be calling them back for future service and/or replacement of my old units. Thanks for being honest! read more

One week before Thanksgiving, the whole family is about to come in, my heat goes out. I checked around and called a different local company they came out said it was the board had to order the board, it would be $400, turns out after that, it wasn't the board. They come back out again say now it's your motor, it's an old unit lots of things are going to break. Needless to say my confidence was shaken. A Friend told me to call mainstream. They came right out within an hour, I explained the situation, I know it's an old unit but I really don't want to replace it around the holidays if I could get through that, if they could just baby get along for me - I know I need a new unit. AJ was super great, Band Aided it back together. So now about to order my new unit from them and the service is been just as great! read more

I have had 3 experiences with this company. All have been GREAT! 1- main unit went out ( old unit 12+ yrs). Came out, told me exactly what was wrong, said could be repaired, but 1 new part in old system, something else would go out later. Knowing how the Nickel and dimeing is a hassle, and it was a 12yr + unit. Was given a quote for a new unit. The owner personally contacted me and we came to an agreement. Crew showed up when supposed to, timely install, and cleaned up after themselves. 2- family member bought a house, we were going to closing in 4 hours. Did our final walk thru, and noticed one of the 3 units was not working. Owner claimed unit had just been serviced ( not mainstream) I called mainstream, explained the issue. The stated could not fix it today. I understood that, and explained I was looking for a diagnosis, and estimate to take to closing. A tech showed up in 30 minutes, explained was older unit, and would cost $ to repair. I asked for estimate for a new system, and was given the estimate. Took it to closing. Received credit at closing for new unit. The following day, I contacted mainstream, and that afternoon a new unit was installed. 3- came home one day and ac was not working, since under warranty from instance #1, I called and had a service tech out in 2 hours. Determined was a short in wiring from thermostat to the control box. Techcompletely rewired it, cleaned up after himself and out the door. No Charge. I use and recommend them. Lots of other companies in the area, and I think I called all of them for my first unit. Got run around by many, high quotes from several. Most just did not give me that comfortable feeling after talking to them. read more

I am so overwhelmed with the SUPREME, yes I said SUPREME service of Mainstream. I called them at 3:00pm and they were here BY 5:00pm. The technician was friendly, and courteous. He was knowledgeable and informative. He not only gave us a quick diagnosis, he also took time to explain why we were having a problem. The heat pump was not pushing out warm air. Wesley wasted no time. Simultaneously he diagnosed and repaired/solved the problem. To our technician; Westley, you're THE MAN. We have heat now. YES! Its REALLY rare these days to find professional, enthusiastic and honest service people. We actually found that today and I couldn't be more elated. KEEP UP THE GREAT WORK MAINSTREAM. Wesley fixed it, (a clogged line) I will be supporting, promoting and recommending them to all of Clarksville. Their service is so spectacular, so superior; I'm purchasing the yearly maintenance plan. Another company quoted for a gas valve with a $400.00 price tag. I love love love MAINSTREAM; these guys are "the bomb.com". Mainstream YOU GET 10 stars. I pray that if you are not already. You, become a nationwide company. Go Mainstream, YOU ROCK! read more

Mainstream services my HVAC every year. Their personnel are always professional and efficient. Shane and Jacob provide exceptional service. These highly skilled technicians do their jobs extremely well. Kudos to Jeff for maintaining a great team at Mainstream! read more

I would highly recommend this company to anyone looking for heating or cooling services. They won't scam you like some other companies out there. They have the best prices in town and are prompt and courteous. read more

RUDE, HORRIBLE guessing game. been out 8 times to fix the unit and not sure if it is still fixed. I asked to him not leave a mess and turn off my lights and Sean did not comprehend. He said he would turn them off and still when I came back the lights were on. Do not use this company...they need to be out of the HVAC business. read more